Add quotes to prevent word split

* Added a quote as per the reported
  warning in CI run to prevent
  the splitting of word.

Author: GauthamBanasandra

dev-support/docker/Dockerfile

@@ -45,7 +45,7 @@ RUN chmod a+x pkg-resolver/install-common-pkgs.sh pkg-resolver/resolve.py \
 # hadolint ignore=DL3008
 RUN apt-get -q update \
     && apt-get -q install -y --no-install-recommends python3 \
-    && apt-get -q install -y --no-install-recommends $(pkg-resolver/resolve.py ubuntu:focal) \
+    && apt-get -q install -y --no-install-recommends "$(pkg-resolver/resolve.py ubuntu:focal)" \
     && apt-get clean \
     && rm -rf /var/lib/apt/lists/*